Table of Contents
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20mA;Frequency Signal 0-50KHZ ................................................................................ 38
3.5 RS485 Communication Circuit ..................................................................................... 41
3.6 Drive Signal Processing Circuit .................................................................................... 44
3.7 Keyboard Circuitry ........................................................................................................ 46
3.7.1 Keypad Key Circuit: ............................................................................................... 47
3.7.2 Keypad Display Circuit .......................................................................................... 48
3.8 VPN Detection and Maintenance .................................................................................. 51
3.9 OH Fault Detection and Maintenance ........................................................................... 52
3.10 Current Acquisition Detection and Maintenance ........................................................ 53
3.11 OC Fault Detection and Maintenance ......................................................................... 54
3.12 Wave-by-Wave Current Limit Comparison Circuit .................................................... 56
Chapter 4. Common Faults Quick Maintenance ..................................................................... 58
4.1 No Display on Power-up ............................................................................................... 58
............................................................................................................................................. 59
4.3 OC Fault (OC1, OC2, OC3, OC4) ................................................................................ 59
4.4 E.SC Fault ..................................................................................................................... 60
4.5 OH Fault ........................................................................................................................ 61
4.6 Relay Non-suction Fault ................................................................................................ 61
4.7 Inconsistent Voltage Values Generated by the Switching Power Supply ..................... 61
4.8 Output Out of Phase (E.OLF) ........................................................................................ 61
4.9 Current Detection Fault (E.HAL) .................................................................................. 62
AC310 Universal AC Drive Service Manual
II
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